Water-tube boiler



Dec. 1, 1925- J. M. SULLIVAN WATER TUBE BOILER Original Filed Aug. 26.1920 76, 72 @ZlZZit/QIZ witness:

Patented Dec. 1, 1925.

UNITED STATES JOHN M. SULLIVAN, 0F CULVER, INDIANA.

WATER-TUBE BOILER.

Originalapplication filed August 26,

To all whom it may concern:

Be it known that I, JOHN M. SULLIVAN, a citizen of the United States,residing at Culver, in the county of Marshall and State ofIndia-na, haveinvented certain new and between the ends of the boiler tubes; the rearuseful Improvements in ater-Tube Boilers, of which the following is aspecification.

This invention pertains in general to steam boilers, this applicationbeing a division of my United States Letters Patent No. 1,473,- T12,granted November 13, 1923, for water tube boilers. One of the primarypurposes of thisinvention is to provide a boiler with baffles soconnected that a continuous circulation of water through them will bemaintained so as to prevent the baffles from burning out, the bafflesbeing connected in a closed circuit, including a feed water heater, sothat the heat units absorbed by the water in the baffles will betransmitted to the feed water on route to the boiler, thereby conservingthese units.

Another object of the invention is the provision of water cooled baffleswhich will not become clogged with sediment and sludge, such ascustomarily collects in baflles to which fresh water is continuouslysupplied,

1 and in which scale and other deposits likely to detract from theefficiency of the apparatus will not collect by reason of the fact thatthe same water is continuously circulated through the bafiles' in aclosed circuit.

Another purpose of the invention is to so arrange the battles that thewater flow therein will be in a direction counter to the direction ofpassage of products of combustion around the baflies, thereby promotinga high eliiciency of the boiler.

On the accompanying drawing, the single figure of which is alongitudinal view partially in section of a boiler embodying myinvention, the boiler is represented as of the usual tube typecomprising the tubes 3, mounted in and connected to the front and rearheaders 4 and 5, respectively, which headers are in turn connected withthe steam drum or cylinder 6 disposed above the tubes. The fire box 7 islocated as usual beneath the tubes above the grates 8, the ash pit 9being disposed beneath the grates, and access to the fire box and to theash pit being obtained through the doors 11 and 12 respectively. Theproducts of combustion are delivered through the outlet flue 13connected to a chimney or stack in the usual manner.

1920, Serial No. 406,113. Divided and this application filed OctoberSerial No. 670,821. 1

Between the fire box and the flue are located a plurality of battles,indicated by referencecharactersl l and 15 respectively, and, as'willbeapparent from the drawings, these baffles are disposed in spacedrelation baffle 15 extends from the drum 6 in a substanially verticalplane downwardly a short distance beneath the lowermost tube 3, whilethe front battle extends upwardly from a point in proximity to the firebox to a point slightly above the uppermost tube 3. Each baffle is ofhollow construction and is provided with a series of transverselydisposed thimbles 16 forming a water tight connection with the walls ofthe baffle, the thimbles being of suitable size to accommodate the watertubes 3, which extend therethrough and fit loosely therein. Thisconstruction permits the ready removal and replacement of the tubes whennecessary for repairs or other purposes without interference by thebaffles. The lower ends of the baffles are connected by one or morepipes 17, as shown.

tition 23 precludes direct flow of water from' the topto the bottom, orvice versa,.of the space at one end of the heater between the header 19and the end ofthe' drum. The fresh water to be delivered to the boilerenters the heater from any suitablesource through the pipe 2 1, thenceflows to the opposite end of the heater, thence upwardly and backwardlyandis delivered to the drum 6 of the boiler through the pipe 25.

The upper end of the rear baffle 15 is connected with the bottom of thefeed water heater by a pipe 26 and the upper end of the other baflle 14;is connected to the top of the heater by a pipe 27 Both pipes 26 and 27connect with the chamber of the feed water heater surrounding the tubes22, and the water surrounding these tubes will heat the water flowingthrough the tubes.

In the operation of my invention the prod nets of combustion rising fromthe fire box 7 pass upwardly in front of the forward baflle 14, thenceover the bafile downwardly between the bafiles, thence rearwardlybeneath the rear baitle and thence upwardly to the outlet flue. Thewater tubes -3 :and the water therein are heated by these products ofcombustion and likewise the Water in thebafiles let and 15, is alsoheated. Since the baffle 14 is'locate'd in the hottest part of thefurnace, the water therein will be highly heated, will rise throughthe-pipe 27 nd be de vered in o 1 t e: teed W t r met -l 11 1 11flowing: downw rdly ar und th tubes 2-2, it will; give up a considerableproto the boiler, and the pool-water will flow downwardly through thepipe into the rear baffle 15, where it will become again .p l yhea edand wil henflfl w-thron pipes 17 into the forward .baflle to be, further.lieatec i ,7

The bellies are connected in a closed circuit, which is initiallyfiilled with clean freshwater. This water,is-continuously ,cir-

,c-ulated and is heated in thebatlles and gives ,ofi itsheat to .theifeed waterin the feed water heater. Since: the samewater iscontinuously beingcirculated and reheated 1t will be observed thatscale,sludgeand other of the battles and theirheat conducting proper;ties is,thereforenof fi ili i li hed withcontlnueCl use; but, "o th ot ham llls'degreeot efficiency is at aill times maintained- Th aifie are ef t vely'ea e by the water therein so .that liability of their burning out isreduced to a ni' i num .and all .of the heat units absorbe rouglrthe ffla e I on rved al fil eisl' r s t the boiler feedwater. a o

The structural, details;illustratedgand de- V scribed may obviously bevaried within considerable lllllllLS WlllhQHl) ;,exce ed;1ng {the 890111.-I'n a watertube boiler, the combination drum above and communicatingwith said tubes, a front hollow baffle and a rear 1101- low battleintermediate the ends of said tubes, the front bai'lle being adjacentthe fire box and so spaced as to permit the products of combustiontopass above thesarne, the rearbafilerben g so" spaced as toper-initthejsaid vproducts to pass between it and v the front battle, andthenbeneath the same, portion of its heat to the fresh water; flowingmeans providing communication between the-hollow interiors ofsaid'bafiies at their lower ends, a feed water heater, andpipes Jofiaplu'ality of Water tubes, a front hollow bathe and rear hollow bailie'intermediate the ends of said tubes and dividing the said boiler into,three .distinctgaspassageways, a lire box; beneath thefirst passageway,means providing communication between the hollow inte'riorsof saidbafiles at. their lower ends, a feed water heater, and pipes connectingsaid heater, andthe interiors of said bailies to form aclosed circuit.

3. .In a watertube boiler, the combinat on .ofa pluralityoi water tubes,a front hollow battle and rear hollow balile intermediate the (ends ofsaid tubes and d vid ng the. said boiler into three dist nct assagewaysfor -the circulation of the proc ucts of combustion around said tubes, afire box beneath ,the first passageway, means providing comntmicationbetween the hollowvinteriors of id b tfl -:.et he rlQWe nds, a e Waterheater having aplurality of tubes .for cirl l tin'g e d Water nd Pipe con n the interior of said heater around said tubes andithe interior ofsaid bafiies to "form a viela e i ir n tor t e fl w of hea ed Wa efronrsaidbafiiesfto raise. the temperature of aidieedate ]J M SULLIVA

